As I've explained before, it's advisable that paranoids make their own AFDBs instead of buying ready-made deflective head-gear since such "solutions" may contain embedded psychotronic circuitry designed to allow through, or possibly induce, mind-control signals favorable to the manufacturer.
Aluminum foil sold for cooking purposes is generally considered safe for anti-psychotronic use, as any embedded psychotronic circuitry that might have been added at the factory will become apparent with the intended orthonoid use, leaving behind suspicious patterns on the surface of foods cooked in the foil. Those wishing to keep their mind-control plots a secret would want to avoid the questions these patterns raise, so they shy away from tampering with the household aluminum supply.
However, many paranoids are still leery of over-the-counter foil. All it would take is one rogue, incautious psychotronic intrigant with access to the foil supply-chain to render an AFDB ineffective -- or even outright complicit in the wearer's mental subjugation. This is where the idea of making your own aluminum comes in.
Locally sourced, artisanal, organic proto-AFDB in goopy stage (aluminum hydroxide).
Fortunately for the paranoid community, Cody of the YouTube channel Cody's Lab has posted a video showing how to refine aluminum from scratch. All you need is a source of aluminous clay or feldspar; some plastic buckets and bottles; a crock-pot; some hydrochloric acid, lye, and cryolite; a furnace capable of reaching 1000° C with a graphite crucible; a 6V, 40 Amp power supply with jumper cables; a carbon rod; a fajita pan; and lots of patience.
His video embedded below provides all the info you need to truly go off the psychotronic grid. Watch it before the ATF shuts him down on spurious pipe-bomb charges.